bug#38457: 27.0.50; dabbrev-expand regression due to message change

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: Eli Zaretskii <eliz@gnu.org>,  38457@debbugs.gnu.org
> Date: Fri, 20 Dec 2019 01:17:38 +0200
> 
> >> +(defcustom minibuffer-message-clear-timeout 2
> >
> > Hey now, shouldn't this be nil by default?
> 
> But Eli said:
> 
>   I won't object as long as the default for Emacs 27 is as in the 2nd
>   variant.
> 
> where the 2nd variant was:
> 
>   after-input=t   after-timeout=2 - clear either on input or after timeout

Oops, I'm so sorry.  I meant the 3rd variant, of course.